Sulfur colors.



CORPORATION OF NEW YORK.

JOSEPH FLACHSLAENDER, KARL PAUL GRliLER-T,

GERMANY, ASSIGNORS TO SYNTHETIC PATENTS AND MAX DUFF, F ELBERFELD,

00., INQ, OF NEW YORK, N. 'Y., A

SULFUR COLORS.

No Drawing.

To all'whomitmay concern: 7 Be 1t known that we, Josnrnc- FLACHS ILAENDER, KARL PAUL (mALnnT, and MAX Burr, doctors of philosophy, chemists, citizens of the German laimpire, residing at Elberfeld, Germany, have invented new and useful Improvements in New Sulfur Colors, of which the following is a specification.

Our invention relates to the manufacture and production of new and valuable brown sulfur colors which are obtained by treating -with alkali polysulfids perimidin compounds of the constitution graphically represented where X and Y include hydrogen, alkyl, aralkyl and aryl groups, and R stands for a naphthalene nucleus, such as perimidin, perimidin-G- or 5.8-disulfonic acid, N(3)-- methylperimidin, (Yr-CH (2)methyl- (2)phenylperimidin, (X CH or -C H (2.3)dimethylperimidin (X. and

Y= C The reaction'can" also be carried out with the addition of copper or a copper compound.

The newdyes are after being dried and pulverized dark powders soluble in a solution of sodium sulfid generally with a brownish to red-brown coloration and soluble in concentrated sulfuric acid with a brownish coloration. They dye cotton generally brown shades distinguished by their the parts bein fastness to light and to boiling. s

In order to illustrate the new process more fully the following example is given, by weight:l80 parts of crystallized so ium sulfid, parts of sulfur, 10 parts of copper powder, 20 parts of perimidin having most probably the following formula:

2 I if an are heated until dry, the temperature being Specification of Letters Patent. Patented Bla r, 23 19151 Application filedSeptember 16. 1913. Serial No. 789,997.

' gradually raised and the heating is then continued for 6 to 8 hours at from 200- 250 C. The melt is powderedv and then ready for use. The dyestufi is a dark powder soluble in a sodium sulfid solution with a reddish-brown coloration. It is soluble in concentrated sulfuric acid with a brownish coloration and dyes cotton in pure and brilliant generally brown shades fast to light and to boiling.

The above mentioned quantities of sodium sulfid and of sulfur as well as the temperature and the duration of the reaction can be varied within wide limits.

We claim 1. The new sulfur dyes being sulfur con-.

taining derivatives of perimidin'compounds containing the nucleus graphically represented;

C/ at where R stands for a naphthalene nucleus which dyes are after being dried and p'ulverized dark powders being soluble in a solution of sodium sulfid generally with a brownish to red-brown coloration; being soluble in concentrated sulfuric acid with a hrownish coloration 5- and dyein un moi denied cotton generally brown s ades fast to light andto boiling, substantially as desdii j hed.

3.- The new sulfur dyes being sulfur conderivatives of periniielin compounds mm? B stands for a naphthalene nucleus o dark powders being soluble in a 1 io ti of sodium sulfid generally with a brows iish to red-brown coloration; being soluble in concentrated sulfuric acid with a i "h coloration; and dyeing unmorsolton generally brown shades fast and to boiling, substantially as dew sulfur dye being sulfur coniiciildyes are after being dried and pul messes icaining. derivagifiqes of pe 'imidin having which is after ioeing dried and pulverized a dark powder soluble in a sodium s'ulfid solution with a reddish-brown coloration and soluble in concentrated sulfuric acid with a brownish coloration; and dyeing unmoi'danted cotton in pure and brilliant gen- ,erally brown shades fast to light and to' boiling, substantially as described.

In testimony whereof We have hereunto set our hands in the presence of two subscribing Witnesses. I

JOSEPH FLACHSLAENDER. [no] KARL PAUL Galilean [1,. 3. MAX some n 8.] Witnesses? ALBERT NUFER, HELEN Nome. K 

